code: def out_shape(self):
      return [
          ShapeSpec(channels=self._out_channels[i]) for i in range(4)
      ]
  
file_path: PaddleDetection/ppdet/modeling/backbones/hardnet.py
imports: import paddle
  import paddle.nn
  from ppdet.core.workspace import register
  from ..shape_spec import ShapeSpec
label_desc: Use image node_id 3 for calling the HarDNet obj's underlying member method code with example usage: obj.out_shape() and returns: unknown